Abstract: A bottle cap is resealable by a valve housed therein. The valve controls flow through both a liquid flow passage and an air supply passage, while maintaining the passages separate. The valve can be actuated by a feed tube spike.

Abstract: An air canopy system for use with equipment producing fumes whose escape into the environment adjacent the equipment is not desired. The system comprises rear and side walls adapted to upstand from adjacent rear and sides of the equipment; an upper canopy surmounting the rear and side walls and cooperating therewith to define a volume for receiving fumes produced by the equipment; an arranged to extend substantially between the side walls in a forwardly spaced relationship from the front of the equipment for cooperation therewith to bound a makeup air receiving inlet for permitting passage of air from the environment into the volume and for cooperation with the side walls and the upper canopy to bound an access opening for the volume, wherein the air curtain is directed towards the upper canopy for preventing escape of fumes from the volume through the access opening; and an exhaust inlet extending along an upper extent of the rear wall for withdrawing fumes and air from the volume.

Abstract: An air canopy ventilation system is disclosed which comprises a surface having two substantially parallel spaced apart side walls surmounted at their respective upper edges by a canopy. A vent means having a plurality of outlets extends between the side walls and substantially the whole length of the front edge of the surface. A fan means connected to the vent means is adapted to drive a flow of air through the vent means upwardly to form a curtain of air over the front of the system, thereby entraining within the area fumes and odors. The upwardly flowing air, fumes and odors are removed by an exhaust means. The exhaust means can include a filter means and a return air means. The system has applications in commercial cooking systems, laboratories, and areas requiring removal of fumes and gases from an enclosed working surface.